Was running into a brick wall trying to figure out why a new user could not create a new ticket on a Request Tracker installation;
RT could not load a valid user, and RT’s configuration does not allow
for the creation of a new user for this email (someguy@example.com).You might need to grant ‘Everyone’ the right ‘CreateTicket’ for the
queue timecard.
Finally after much code-reading and test-account-creating, I searched users including ‘disabled users’ and found there was an old defunct user that had this same email address but from whom permissions had been revoked. Wow that was frustrating. Noting this here in case it might help someone else, or me next time this happens 18 months from now!